“We are experiencing strong momentum in the ATI-052 clinical development program including the recent positive Phase 1a interim results which demonstrated a strong safety and tolerability profile, extended pharmacokinetics, and concentration-dependent pharmacodynamics even at the lowest dose,” said Dr.
This randomized (3:1), blinded, placebo-controlled Phase 1b POC trial will evaluate the safety and tolerability of ATI-052 compared to placebo in patients with moderate-to-severe AD. Other endpoints that will be assessed include AD clinical efficacy assessments (Eczema Area and Severity Index (EASI), validated Investigator Global Assessment (IGA) response, and Peak Pruritus Numerical Rating Scale (PP-NRS)), pharmacokinetic parameters, and pharmacodynamic endpoints measured by assays including lesional and non-lesional skin tape strips.
Aclaris also expects to initiate a Phase 1b POC trial in asthma in the first quarter of 2026. Top line results from both POC trials are expected in the second half of 2026.
About ATI-052
ATI-052 is an investigational humanized anti-TSLP and anti-IL-4Rα bispecific antibody that simultaneously inhibits thymic stromal lymphopoietin (TSLP) and interleukin-4 receptor (IL-4Ra) with high affinity and potency. By targeting TSLP, which sits at the top of the inflammatory cascade, it inhibits a broad range of inflammation; by targeting IL-4Rα, it blocks both downstream IL-4 and IL-13, which are key cytokines involved in Th2-mediated inflammation and allergic diseases. ATI-052 exhibits potential best-in-class potency and utilizes the same TSLP antigen-binding fragment (Fab) region as bosakitug (ATI-045), retaining the dissociation kinetics, long residence time, and high potency advantages over comparator antibodies, but is engineered to bind more tightly to the neonatal Fc receptor (FcRn) to extend its half-life. ATI-052 has the potential to treat a variety of atopic, immunologic and respiratory diseases. Aclaris has the exclusive worldwide rights to ATI-052, excluding Greater China.
About
Cautionary Note Regarding Forward-Looking Statements
Any statements contained in this press release that do not describe historical facts may constitute forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. These statements may be identified by words such as “anticipate,” “believe,” “expect,” “intend,” “may,” “plan,” “potential,” “will,” and similar expressions, and are based on Aclaris’ current beliefs and expectations. These forward-looking statements include expectations regarding its development plans for ATI-052, including the timing to initiate its Phase 1b trial of ATI-052 in asthma and the timing to report results from its Phase 1b trials of ATI-052 in AD and asthma, the potential for ATI-052 to be a best-in-class anti-TSLP/IL-4Rα bispecific monoclonal antibody, and the therapeutic potential for ATI-052 including in other atopic, immunologic and respiratory diseases. These statements involve risks and uncertainties that could cause actual results to differ materially from those reflected in such statements. Risks and uncertainties that may cause actual results to differ materially include uncertainties inherent in the conduct of clinical trials, potential changes to interim, topline and preliminary data as more subject data become available, Aclaris’ reliance on third parties over which it may not always have full control, Aclaris’ ability to enter into strategic partnerships on commercially reasonable terms, the uncertainty regarding the macroeconomic environment and other risks and uncertainties that are described in the Risk Factors section of Aclaris’ Annual Report on Form 10-K for the year ended
Aclaris Therapeutics Contact:
Senior Vice President
Corporate Communications and Investor Relations
(484) 329-2125
wroberts@aclaristx.com
Source: Aclaris Therapeutics, Inc.